The note: “Comparing starting torques of constant chord and tapered blades” has been added at the bottom of the menu KD-reports. It appears to be true that rotors with constant chord blades have a somewhat lower starting torque coefficient than rotors with tapered blades if both have the same design tip speed ratio. However, constant chord blades use much less material and are much easier to manufacture.

This note has been cancelled and replaced by report KD 697.